From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@linux.intel.com>
Subject: Re: [PATCH 1/6] drm/i915/psr: Avoid DPCD reads when
 panel does not support PSR
Date: Thu, 24 May 2018 16:29:16 +0300
Message-ID: <87a7spji6r.fsf@intel.com>
References: <20180511195145.3829-1-dhinakaran.pandiyan@intel.com>
 <20180518002740.GA67699@otc-chromeosbuild-5>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mga07.intel.com (mga07.intel.com [134.134.136.100])
 by gabe.freedesktop.org (Postfix) with ESMTPS id D40CC6E658
 for <intel-gfx@lists.freedesktop.org>; Thu, 24 May 2018 13:25:20 +0000 (UTC)
In-Reply-To: <20180518002740.GA67699@otc-chromeosbuild-5>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: Tarun Vyas <tarun.vyas@intel.com>, Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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=